I recently bought a used Fuji xpro1. An old camera, but so far i'm loving it. Everything has been working fine so far, but today i noticed that the OVF, more specifically the horizontal guidelines, had turned into an offset box. The lines simply disappeared.

This confuses me, as it was working fine yesterday. What could the problem be /p/ ? It should be noted that i'm not using a Fuji lens but an old Olym,pus lens with an adapter, but that shouldn't be a problem as the OVF worked perfectly fine up to now.